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Multifunctional off-line cleaning device for reverse osmosis membrane

A technology for cleaning devices and reverse osmosis membranes, applied in the direction of semi-permeable membrane separation, membrane technology, chemical instruments and methods, etc., can solve the problem of inability to operate reverse osmosis membranes on-site and provide rationalization advice, can not completely solve the problems of membrane pollution, desalination rate, Reduced flow rate and other issues, to achieve the effect of saving drug switching time, avoiding waste, and low operating costs

Inactive Publication Date: 2006-10-04
TIANJIN CHEM RES & DESIGN INST
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Problems solved by technology

[0002] At present, reverse osmosis technology has become more and more popular, and it is more and more used in sewage reuse, seawater desalination, food, chemical and other industries. With diversified uses, the situation of reverse osmosis membrane pollution is becoming more and more complicated, and the degree of pollution is also increasing. Seriously, many reverse osmosis membranes are depleted, which causes the pressure difference of the membrane elements to rise during the working process, the desalination rate and flow rate drop, and even fail to work normally. On-line routine cleaning can no longer completely solve the problem of membrane fouling, resulting in the system having to be replaced with new ones. Membrane elements, causing unnecessary waste of cost
[0003] At present, there are many molded products of offline cleaning equipment, but it is often only an improvement of single membrane operation for the inconvenience of cleaning caused by the series connection of several sets of membrane elements in the system. Although this cleaning equipment is suitable for off-line cleaning of generally polluted elements, However, for some membrane elements with special pollution or serious pollution, there is often nothing that can be done.
In addition, the types of reverse osmosis chemicals are becoming more and more complicated. The selection of suitable antiscalant products is the basic guarantee for prolonging the life of reverse osmosis membrane elements. There are formed cleaning equipment, which can only conduct a simple and immediate test on the situation after cleaning at that time, and cannot provide reasonable suggestions for the on-site operation of the reverse osmosis membrane in the future

Method used

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  • Multifunctional off-line cleaning device for reverse osmosis membrane

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Embodiment 1

[0023] Two reverse osmosis membrane containers are connected in parallel, and each reverse osmosis container is cleaned and flushed independently. Two kinds of cleaning agents are added to the two cleaning tanks of G1 and G2 respectively, and each chemical solution is controlled by valves to perform cycle cleaning operation separately. After the high-pressure pump is controlled by the valve to perform single-branch membrane operation and forward and reverse cycle cleaning, the flow rate of the cleaning liquid entering the membrane element is controlled through the return valve, and the cleaning liquid passes through the reverse osmosis membrane element and returns to the cleaning tank through the valve to continue the cycle cleaning. Rinse from the clean water tank G4 at low pressure, close the circulation valve and open the discharge valve, discharge the flushing liquid directly, flush until the conductance returns to the lowest value, conduct a water production test, measure ...

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Abstract

The invention discloses a film water curing technique of multifunctional hyperfiltration film off-line purifier, which is characterized by the following: the pollution in reverse osmosis membrane system is cleared by carrying out the techniques of film positive washing, negative washing and pure water side pressurization washing; the invention can evaluate and test agent and reverse osmosis membrane property by imitating field producing water condition.

Description

Technical field: [0001] The invention relates to membrane water treatment technology. It is a multifunctional off-line cleaning device for reverse osmosis membranes. Through the technical implementation of new concepts such as single membrane forward washing, backwashing and pure water side pressure, the pollution in the reverse osmosis membrane system can be completely removed, and the invention also By simulating on-site water production conditions, the performance of chemicals and reverse osmosis membranes can be evaluated and tested. Background technique: [0002] At present, reverse osmosis technology has become more and more popular, and it is more and more used in sewage reuse, seawater desalination, food, chemical and other industries. With the diversification of uses, the situation of reverse osmosis membrane pollution is becoming more and more complicated, and the degree of pollution is also increasing. Seriously, many reverse osmosis membranes are depleted, which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D65/02
Inventor 郑书忠陈爱民聂明
Owner TIANJIN CHEM RES & DESIGN INST
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